Add device support: MCP4728 (#3174)

* Added MCP4728 output component.

* Added tests to test1.yaml

* Added codeowners

* Lint fixes

* Implemented code review changes

* Lint fixes

* Added i2c communication check on setup()

* Fixed tests

* Lint fix

* Update esphome/components/mcp4728/mcp4728_output.cpp

Changed log function

Co-authored-by: Otto Winter <otto@otto-winter.com>

Co-authored-by: Otto Winter <otto@otto-winter.com>

esphome/components/mcp4728/__init__.py

@@ -0,0 +1,29 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import i2c
+from esphome.const import CONF_ID
+
+CODEOWNERS = ["@berfenger"]
+DEPENDENCIES = ["i2c"]
+MULTI_CONF = True
+CONF_STORE_IN_EEPROM = "store_in_eeprom"
+
+mcp4728_ns = cg.esphome_ns.namespace("mcp4728")
+MCP4728Component = mcp4728_ns.class_("MCP4728Component", cg.Component, i2c.I2CDevice)
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(MCP4728Component),
+            cv.Optional(CONF_STORE_IN_EEPROM, default=False): cv.boolean,
+        }
+    )
+    .extend(cv.COMPONENT_SCHEMA)
+    .extend(i2c.i2c_device_schema(0x60))
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID], config[CONF_STORE_IN_EEPROM])
+    await cg.register_component(var, config)
+    await i2c.register_i2c_device(var, config)